I have an early '04 F-250 2WD, 6.0 w/ 210K on it. EGR
delete, 4" exhaust. I have always had the idle-up come on cold ( aprox. 1K rpm even if the ambient temp is 80 degrees ) and then idles down and all is good. However I have never been able to get it to idle down with the brake pedal or putting in gear. If I start to drive and if it has not idled up yet, it will all the sudden jump up while driving. I have gotten used to it and not that big a deal. However, now, it seems does it at random with the engine at any temp... My Edge CTSII shows all seems normal for the most part but It seems that the ICP
#'s are fluctuating a bit more than normal ( I think ) at highway speeds but I don't feel it in the truck... ICP
idle warm is always been a is a solid 638+-10psi. IPR
is a solid 25% at idle warm. No codes, but I have seen a MAF
code in the past, cleared it a has not come back. Turbo feels/sounds normal, good vane sweep at idle, 25+lbs boost when needed, all temps are awesome !! I am suspicious that I am approaching Injector replacement time but I don't think/understand why that would be giving me hi-idle issues... All that being said, the truck runs like a bat out of hell, lots of power, but it is rough and not right when it's in this hi-idle mode...I just don't know what's going on with the Idle... Any Ideas ??
Thanks everyone !!!